Why is day light saving a thing?

Related questions

1. Does New Zealand have one timezone?
2. Do we gain or lose an hour on March 11?
3. What is federal law for Daylight Savings Time?
4. How many hours is 8am till 7pm?
5. How many hours in front are New Zealand?
6. Did time go forward today?
7. Did we gain or lose an hour 2019?
8. How many hours is 8am to 5pm?
9. What country celebrates the New Year first?
10. How much is 15 minutes in an hour?

Tags

1. #saving
2. #world
3. #dates
4. #summer
5. #energy
6. #purpose
7. #months
8. #during
9. #sources
10. #better
11. #clocks
12. #places
13. #countries
14. #daylight
15. #according
16. #change
17. #saves
18. #morning
19. #called
20. #different
21. #evening